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AlignToVideo: Improve rgb->lab precision

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Oneric 2020-07-17 17:09:05 +02:00
parent 26f0713aae
commit 7f4cdaea42
1 changed files with 3 additions and 6 deletions
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9
src/dialog_align.cpp
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@ -156,12 +156,9 @@ namespace {
void rgb2lab(unsigned char r, unsigned char g, unsigned char b, double* lab)
{
double R = static_cast<double>(r) / 255.0;
double G = static_cast<double>(g) / 255.0;
double B = static_cast<double>(b) / 255.0;
double X = 0.412453 * R + 0.357580 * G + 0.180423 * B;
double Y = 0.212671 * R + 0.715160 * G + 0.072169 * B;
double Z = 0.019334 * R + 0.119193 * G + 0.950227 * B;
double X = (0.412453 * r + 0.357580 * g + 0.180423 * b) / 255.0;
double Y = (0.212671 * r + 0.715160 * g + 0.072169 * b) / 255.0;
double Z = (0.019334 * r + 0.119193 * g + 0.950227 * b) / 255.0;
double xr = X / 0.950456, yr = Y / 1.000, zr = Z / 1.088854;
if (yr > 0.008856) {